Katy Thatcher was the bright and curious daughter of the town doctor. She was fascinated by her father's work, and even as a child she knew that she too wanted to be a doctor. She wanted to know about people. Perhaps it was this, her insatiable curiosity, or simply the charm of Jacob's gentle intimacy with animals large and small, that fueled their friendship. Although Jacob never spoke to her or even looked at her directly, Katy grew to understand...